package com.qianbei.common.utilis.img;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 * 圆形的Imageview
 * @since 2012-11-02
 * 
 * @author bingyang.djj
 * 
 */
public class CircleImageView extends ImageView {
	   public CircleImageView(Context context, AttributeSet attrs) {
           super(context, attrs);
           init();
   }

   public CircleImageView(Context context) {
           super(context);
           init();
   }

   private final RectF roundRect = new RectF();
   private float rect_adius = 90;
   private final Paint maskPaint = new Paint();
   private final Paint zonePaint = new Paint();

   private void init() {
           maskPaint.setAntiAlias(true);
           maskPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
           //
           zonePaint.setAntiAlias(true);
           zonePaint.setColor(Color.WHITE);
           //
           float density = getResources().getDisplayMetrics().density;
           rect_adius = rect_adius * density;
   }

   public void setRectAdius(float adius) {
           rect_adius = adius;
           invalidate();
   }

   @Override
   protected void onLayout(boolean changed, int left, int top, int right,
                   int bottom) {
           super.onLayout(changed, left, top, right, bottom);
           int w = getWidth();
           int h = getHeight();
           roundRect.set(0, 0, w, h);
   }

   @Override
   public void draw(Canvas canvas) {
           canvas.saveLayer(roundRect, zonePaint, Canvas.ALL_SAVE_FLAG);
           canvas.drawRoundRect(roundRect, rect_adius, rect_adius, zonePaint);
           //
           canvas.saveLayer(roundRect, maskPaint, Canvas.ALL_SAVE_FLAG);
           super.draw(canvas);
           canvas.restore();
   }

}
